Demountable adjusting means for machine gauges



Aug. 8, 1950 E. J. wlTcHGER DEMOUNTABLE ADJUSTING MEANS FOR MACHINE GAUGES Filed April 28,1947

uuml un 1 l hul INVENTOR. fu ene f/.M//t el.

Iatentec ug. 8, 1.95K() Y initio' 'BLE' ADJUsTING MEANS Fon Eugene -J. l Witchg ITIVINE GAUGES er, Saginaw, Mich.,.assignor to TheLLufkin Rule Coi, Saginaw, Mich.

. fiApplicatiqii "'jIhis' invention irelatesV to gauges Vfor V'use by machinists` and mechanics `Shop -"practie, `vand `"one of itsy several objects is' to provide a gaugefor the measurement of heightson planerss'hapers, and checking on surface plate as well as for use in'connection with gauge blocks.

One of theprime .object siof .the .invention is to provide a gaugeembodying certain refinements iin sitslfeatures of*` adjustment, that -permits the gauge head to be set quickly.` at` roughly approximate positionon: thegauge, and provide adjustablek means associated with the gauge for thereafterlfadjusting said headj withy precisionnto a, iha1seiting- A A Y -v Another object'is'to provide a simplev andi substantial adjusting means that can be readily mounted, that is automatically secured against accidental displacement when set, and by means of which extremely ne and accurate adjustment can be made.

Another object is to provide a simple and economical adjusting mechanism that can be easily and quickly mounted on the hypotenuse surface of a gauge, which is readily adjustable thereon, and which is securely held in set position.

With the above and other objects in view, the present invention consists of the combination and arrangement of parts, hereinafter more fully described, illustrated in the accompanying drawing, and more particularly pointed out in the appended claims, it being understood that changes may be made in the form, size, proportion, and minor details of construction, without departing from the spirit, or sacrificing any of the advantages of the invention.

n the adjusting screw being broken away to show the assembly.

" Referring now more specically to the drawing in which I have shown the preferred embodiment of my invention. The gauge proper is indicated generally at G. This is of conventional design, and an inverted T-shaped slot 8 is provided in the upper inclined face of the gauge, and divides said face into transverselyv inclined side .sections 9 which are pitched towards the slot,

and a `clamp plate I9 is slidably mounted in the vhead section I I of the slot as usual. I 'C Thegauge headH is adjustable on the upper edge 8 in the conventional manner, and a clamp screw and nut assembly I2' and I4 respectively serves to clamp it inset position. In the setting of the gauge head for precision measurements,

the head Vis pushed orzlightly tapped into position, making minute adjustment somewhat difiicult, and I, therefore, provide a slide adjuster fA which slides on the upper edge of the gauge in the same manner as the4 gauge. head; and provide manuallyoperable .threaded 4means thereon for minutely adjusting the head, said means comprising a body member I5, the lower face of which is shaped to fit and slide on the side sections 9 of the gauge.

Openings I6 and I'I are provided in the side and bottom walls of the body member at a point spaced equidistant from the ends, and accommodate a pair of clamp members I8 and I9 which are pivotally mounted in the body member by means of the longitudinally disposed pin 29, the lower end of the clamp I8 being bifurcated as shown at 2l, and the ends of the bifurcated sections are formed with laterally projecting sections 22 and for a purpose to be presently described.

The companion clamp I'9' is formed with a single leg projection 23 which is accommodated in the bifurcated section 2|, and the lower edge is also formed with an opposed laterally projecting section 24 similar to the section '22, the lower ends of these clamps being hingedly connected together by means of the pin 20 which is mounted in a body A.

A longitudinally disposed adjusting screw 25 is mounted in the lower section of the body member I5, and is provided with a head 26 as usual, the clamps I8 and I9 being recessed as at 2'I to accommodate said screw.

These clamps I8 and I9 are also chamfered as at 28, and one leg of a spring 29 is secured to the inner face of the clamp I9 at a point directly adjacent the upper edge thereof, the opposite leg of said spring bearing against the inner face of the opposite clamp, and tends to force the upper ends of the clamps from each other.

The lower sections of the clamps I8 and I9 are formed to engage and slide in the T-shaped slot 8, and when the clamp is in position shown in Figs. 3 and 4 of the drawing, the sections 22 and 24 are forced outwardly and into locking en- 3 gagement with the walls of the slot 8 so that it will be rmly locked on the gauge, but when the upper ends of the clamps are forced towards each other, the lower end sections will be disengaged, and the attachment is then freely slidable in either direction.

In practice, the gauge head H is set quickly at a roughly approximate position, after which the clamp members I8 and I9 are forced toward each other, sc that the attachment can be moved to bring the end of the adjusting screw 25 into engagement with the lower edge of the gauge head which has been set at roughly approximate position; then by manipulation of the knurled head 26 of the adjusting screw, the gauge head H can be adjusted with precision to a final setting, after which the nut I4 on the screw I2 it tightened to secure the gauge head in set position and prevent accidental displacement thereof during further handling.

From the foregoing, it will be clearly obvious that I have perfected a very simple, practical,

4 the lower ends thereof for frictionally engaging the walls of said slot to lock said body in set position, and an adjusting screw mounted in said slide and engageable with said gauge head for adjusting said gauge head as the screw is actuated.

2. The combination as defined in claim 1 in which the body sectionis recessed to accommodate the spring pressedhingedly connected clamping members, and recesses in said clamps above the pivotal mounting to accommodate the adjusting screw.

3. The combination with a gauge base having a hypothenuse surface provided with a T-slot coextensive therewith, a gauge head slidably adjustable on said surface, an adjusting member slidable in said slot, pivotally connected springpressed clamps mounted on said adjusting member and extending therethrough for frictional engagement with the walls of the slot for locking it on thebase, and a longitudinally disposed adjusting screw mounted in said adjusting member and engageable with the gauge head for adjusting it to nal setting on said base.

EUGENE J. WITCHGEB.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS 

